Conformationally Assisted Lactamizations for the Synthesis of Symmetrical and Unsymmetrical Bis-2,5-diketopiperazines
摘要:
Open-chain N-Cbz-protected-peptidoyl benzotriazolides are converted by a novel lactamization strategy using proline as a turn introducer into both symmetrical (5a-c and 11a-c) and unsymmetrical (19a-e) bis-2,5-diketopiperazines (bis-2,5-DKPs), previously recognized as difficult targets.
Potential Antitumor Agents via Inhibitors of L-Asparagine Synthetase: Substituted Sulfonamides and Sulfonyl Hydrazides Related to Glutamine
作者:Steven Brynes、Victor J. Fiorina、David A. Cooney、Harry A. Milman
DOI:10.1002/jps.2600671115
日期:1978.11
synthesized as potential inhibitors of L-asparagine synthetase and subjected to screening as antitumor agents. Target amino acids were obtained by condensation of a blocked reactive sulfonyl chloride with the appropriate amine or hydrazide, followed by deblocking with hydrogen--palladium or liquid hydrogen fluoride--anisole. Neither the target compounds nor their protected precursors inhibited the enzyme
A benzotriazole-mediated route to protected marine-derived hetero-2,5-diketopiperazines containing proline
作者:Olivier Nsengiyumva、Sadra Hamedzadeh、James McDaniel、Jocelyn Macho、Grant Simpson、Siva S. Panda、Khanh Ha、Iryna Lebedyeva、Hassan M. Faidallah、Manal Metgen AL-Mohammadi、C. Dennis Hall、Alan R. Katritzky
DOI:10.1039/c5ob00023h
日期:——
Dipeptidoyl benzotriazolides containing proline were cyclized by triethylamine into 2,5-diketopiperazines.
含脯氨酸的二肽苯并三唑酰胺被三乙胺环化成2,5-二酮哌嗪。
METHOD FOR THE PREPARATION OF (3S, 3S') 4,4'-DISULFANEDIYLBIS (3-AMINOBUTANE 1-SULFONIC ACID)
申请人:Balavoine Fabrice
公开号:US20130231500A1
公开(公告)日:2013-09-05
The present invention relates to a new method for the preparation of (3S,3S′) 4,4′-disulfanediylbis(3-aminobutane 1-sulfonic acid) in five steps from (S)-ethyl 2-(benzyloxycarbonylamino)-4-(neopentyloxysulfonyl)butanoate A.
Method for the preparation of (3S, 3S′) 4,4′-disulfanediylbis (3-aminobutane 1-sulfonic acid)
申请人:Balavoine Fabrice
公开号:US09187418B2
公开(公告)日:2015-11-17
The present invention relates to a new method for the preparation of (3S,3S′) 4,4′-disulfanediylbis(3-aminobutane 1-sulfonic acid) in five steps from (S)-ethyl 2-(benzyloxycarbonylamino)-4-(neopentyloxysulfonyl)butanoate A.
Method for the preparation of (3S,3S′) 4,4′-disulfanediylbis (3-aminobutane 1-sulfonic acid)
申请人:QUANTUM GENOMICS
公开号:US09340497B2
公开(公告)日:2016-05-17
The present invention relates to a new method for the preparation of (3S,3S′) 4,4′-disulfanediylbis(3-aminobutane 1-sulfonic acid) in five steps from (S)-ethyl 2-(benzyloxycarbonylamino)-4-(neopentyloxysulfonyl)butanoate A.